I still feel like you focus too much on the hourglass body-type shape so much to the point that it compromises your figure. Her waist on our left (her right) goes in a bit too far up near the rib cage; even a corset couldn't squish you down that much.

Would you believe that most images that come up even when you type "human female skeleton" are in fact male? You can tell by the width of the shoulders vs. the hips and how far the "heart" of the rib cage expands outward...

Anyways, my point for you is that now that you have reference, you should try to learn the basics of the structure underneath the body. The more you know of the bones and muscles, the easier it is to make interesting poses for your drawings and still make it look believable. (I'm not saying you have to memorize every bone and ever stupid little muscle in the body... only extreme scientists do that. But a decent knowledge of underlaying structure will just make you a better artist. ^^)

I learned all my stuff from the show Bones and from my own observations. XD Like, at school, when someone moves their arm, note how the shoulder muscles either stand out or relax according to the movement, an same with the leg muscles. Or you can be an idiot like me and smile, raise your eyebrows, and mouth the alphabet at yourself in the mirror to note how the hairline, ears, and nose move according to what facial expression you're making...

I lov the almost Impressionism-style shading in the hair, a.k.a. a bit blurred, as if the eyes were unfocused. I have a feeling that the original irl is brighter, sharper, and has more color contrast, but it's often hard to get digital copies of traditional art to look like the real thing.